TI-H: Upgrade Ti-92 RAM

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TI-H: Upgrade Ti-92 RAM

  Ram.txt, which comes with Fargo, says,"The TI-92 is capable of addressing
256 kb of interleaved RAM."  I then remembered seeing something on the web
about an open memory socket in the TI-92, so I did some investigation.  
  I first found the page with the RAM info,
http://www.wam.umd.edu/~ltduck/ti92/ti92.html
  I then opened my 92 and found the ram module ( labeled U10
TC551001BFTL-85L.  Went to Toshiba's page and found out the pin assignments
in a PDF file.  It is a 32 pin 128kx8 85ns 5V SRAM.  Following the paths on
the circuit board, I figured out that the open pads on the 92's board (
labeled U10R ) have the pinout of the chips TC551001BTRL-85L or
TC551001BTRI-85L.  I also found that Marshall electronics sells these chips
for about $24.
  I'll try to get a free sample of the chip, Marshall gives out samples I
think, and see what I can do.  The solder pads are VERRY close together, and
I have a tight budget so I'm a little reluctant about messing around with my
$150 calc.  If anyone else has more info I'd like to know. 


Bill Stysiack
wjs12@cornell.edu